Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.
What was the probability that Deirdre and Geoff's first child would express the albino trait?
A. 1/2
B. 3/4
C. 1/8
D. 1/4
Answer: A
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True or False: Most human behaviors are a product of both nature and nurture, but this does not apply to neurologically simple organisms such as the fruit fly
A. true B. false
Pioneers of the American West used the plant called
horsetails a. as pot scrubbers. b. as sandpaper. c. for decoration. d. for kindling. e. for food.
A 39-year-old man presents with severe abdominal cramping accompanied by nausea, vomiting, and bloody diarrhea. During your assessment, the patient tells you that in an attempt to kill himself, he intentionally ingested some castor beans because he heard they were poisonous. The patient's blood pressure is 96/58 mm Hg, heart rate is 112 beats/min, and respirations are 24 breaths/min. Which of the following statements regarding this scenario is correct?
A) You should quickly don a mask and gown because this patient's condition is highly communicable. B) Castor beans commonly cause the symptoms your patient is experiencing but rarely result in death. C) Your patient has ingested the key ingredient for ricin and is at high risk for vascular collapse and death. D) This patient has exposed himself to botulinum toxin and will soon experience diaphragmatic paralysis.
A strain with a nonfunctional ________ protein would generate many mutations because the error-prone SOS system would never be repressed
a. RecA b. LexA c. HisC d. DNA polymerase IV